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The Western United States’ largest trade show and conference for the On-Site Septic Industry

2026 agenda to come

WOSSA

2606 W PIONEER AVE BLDG #1045,

PUYALLUP, WA 98371,

United States

(253) 770-6594 info@wossa.org

Hours

Mon 9am - 5pm

Tue 9am - 5pm

Wed 9am - 5pm

Thu 9am - 5pm

Fri 9am - 5pm

Sat Closed

Sun Closed

Check out our 2026 event page on Facebook

Event location: Greater Tacoma Convention Center • 1500 Commerce Street Tacoma, WA 98402

WOSSA • Phone: (253) 770-6594 • Email: info@wossa.org